Content Container Nailor Model 0722 Ceiling Dampers are for use in round applications, in lieu of hinged door type dampers in any UL/ULC floor/ceiling or roof/ceiling assembly with up to a 3 hour fire resistance rating where air ducts are allowed. Exteneded collar models 0722-SE and 0722-LE available. Adjustable models 0722A, 0722A-SE, and 0722A-LE available. Models 0722 - Round 0722-SE - Round • Short Top Extension 0722A - Round, Adjustable 0722A-SE - Round • Short Top Extension, Adjustable 0722-LE - Round • Long Top Extension 0722A-LE - Round • Long Top Extension, Adjustable Submittals All Submittals Combined Individual Submittals 0722 • Ceiling Radiation Damper • Round 0722-SE, 0722-LE • Ceiling Radiation Damper • Butterfly Type • Short and Long Extensions • Round 0722A • Ceiling Radiation Damper • Round, Adjustable 0722A-SE, 0722A-LE • Ceiling Radiation Damper • Butterfly Type • Short and Long Extensions • Round IOM 0700 • Ceiling Radiation Damper w/ Thermal Blanket • Lay-in Diffuser Applications • Installation Instructions 0700 • Ceiling Radiation Damper • Inspection & Maintenance Procedures 0700 • Ceiling Radiation Dampers • Steel Duct Support Applications • Installation Instructions Catalog